Ammonia slip catalysts (ASC)

Designed to enhance SCR performance, these catalysts achieve greater NOx control in parallel with lower carbon monoxide emissions and minimal ammonia slip. 

This technology offers our customers superior SCR performance with reduced catalyst volume and lower material costs.   

Johnson Matthey’s ASC technology removes residual ammonia (NH3) from upstream ammonia dosing systems, converting it into nitrogen (N2) and water (H2O).

[NH3] → N2 + H2O

Current ASC technologies are also able to convert NOx to nitrogen.

NOX + NH3 → N+ H2O

Composition: Designed to include oxidation (typically Pd, Pt or Rh) and reduction functions (typically metal zeolite) coated on a flow-through monolith.


General enquiries

EU and Asia applications

North America applications